Cita APA

Robert H. Frank. (2004). Principles of economics. Boston: McGraw-Hill.

Chicago Style Citation

Robert H. Frank. Principles of Economics. Boston: McGraw-Hill, 2004.

Cita MLA

Robert H. Frank. Principles of Economics. Boston: McGraw-Hill, 2004.

Atenció: Aquestes cites poden no estar 100% correctes.